According to the composition of pectin, it can be divided into two categories: homogeneous polysaccharide pectin such as D- galactan, L- arabinan and D- galacturonic acid polysaccharide; Heteropolysaccharide pectin is the most common, which is composed of galacturonic acid polysaccharide, galactomannan and arabinan in different proportions, and is usually called pectin acid.

It can be used as gelling agent, thickener, stabilizer, suspending agent, emulsifier and flavoring agent in food, and can also be used in cosmetics to play a certain role in skin care, ultraviolet protection and wound treatment.